The moment Kuro opens a can of absolute whupass on the tribal end she encounters in the first episode. From the theme music powerup, the animation, and the fact she juggled him twice as he was falling! The final punch is it's own CMOA, 'cuz it sends him flying! You can see it here, from 7:31-8:14.
In the anime, Reishin fights the equivalent of Satan times two with the powers of fire and ice.
